George edmund donisthorpe



@uitrit grafts geirrt @fre- GEORGEEDMUND .ooNIsTHoRPn oF LEEDS, ENGLAND.

Letters Patent No. 81,753, dated September-1, 1868; patented in England,April 28,.; 8613.

IMPROVED GOAL-MINING APPARATS.

TO ALL 'IO WIIOM IT MAY CONCERNE Be it known that I, GEORGE EDMUNDDONISTHORPE, of Leeds, in the,ccunty of York, England,.a subject ofthe-Queen of Great Britain, have invented or discovered new and usefulImprovements in Apparatus Used when'Getting Coal and other minerulsg andI, the said GEORGE. EDMUND DONISTIIORPE, do hereby declare the nature ofthe said invention, and in what manner the same is to be performed, tobe particularly described and ascertained in and bythe followingstatement thereof; that/is to say- This invention has for its objectimprovements in apparatus used when getting coal and other minerals.

l i When using a travelling-carriage, with picking or othercutting-apparatus mounted thereon,.for getting coal and ,other minerals,it has been usual, in order to resist the vibration consequent on theregula-r ,successivo impacts or actions of the picks or othercutting-tools, to make the carriage of considerable weight.

low, the object of the present improvemcntsis to obtain the requisiteStability and capability to resist vibration when a lighttravelling-carriage is employed, and the improvement herein claimedconsists in a novel method of holding the carriage between the floor androof of the mine, by applying a wheel or wheels to the carriage to actagainst-the roof of the working, in addition to thewhecls or slides,which rest on the rails or ways, along which `the carriage is'moved fromplace to place inthe coal or other mine which is being worked,

such additional wheel o'rV wheels being pressed elasticallyagainst theroof of the mi ne,lso as to accommodate itself to irregularitiesthereof.

The improvement consists, further, in the employment of a piston in acylinder containing compressed air, acting directly or by-interposedlevers on the axis ofthe wheel orwheels in contact with the roof,substantially as hereinafter shown, as the most convenient means ofapplying therequisite'pressure.

And in order thatimy said invention may be most fully understood andreadily carried into effect, I will proceed to describe the drawingshereunto annexed.

Description of the Drawings. Figure lis a side view, Figure 2 an endview, and l Figure 3 a plan of apparatus for getting coal orothermineral, arranged according to my invention and in the manner Iprefer.

Figures 4 and 5 show some of the'p'arts separately. v a a is the framingor carriage of the machine; it is mounted on wheels which run ontramways e c. d" is va horizontal cylinder, tted with a piston, andsuitably arranged for being worked with compressed air; it

`is'iirmlysecured to the frame or carriage a a, cZ is the rod` of thepiston; Working in the cylinder d; its outer end is passed through thebarfl forming part of the sliding or travellinglframe and is theresecured between nuts d2 d2. A small cylinder, e, is cast on the cylinderd, and in the cylinder csoitable pistou-valves Work to admit'compressedairalternately on either side ofthe piston in the cylinder cl, so-as tocause the piston, withits rod and parts connected therewith, to move toand fro. A ilexible pipe is employed to conduct the 'compressed air tothe apparatus from the air-pumps or other machinery' employed tocondenseil.. The valve-rod el, employed to actuate thc valves, `mayeither be worked by a lever-handle, e2, worked by hand, as shown, or, ifdesired, the

.valve may be' made self-acting. g is another cylinder, alsorcast in thesame piece with the cylinder d; it stands vertically upon it; and withinthe 4cylinder g is a plunger, It; it is furnished at its lower cndlwithmetallic packing, to cause itvto {it the cylinder air-tight, and it hastwo lugs, h1 h, cast upon its upper end. 'Between the two lugs 7t,'aframe, consisting of two plates or cheeks, 7a2 h?, is received andpin-jointed at ha. Four or other convenient number ofwh'eels, it* Maremounted between the plates or. cheeks h2 h2 and the studs on which thesewheels revolve serve to hold together the plates or cheeks h2. Byripening a cock, provided for-the purpose,

compressed air can be'admittefl to the cylinder g, and the'plunger L iscaused'to-rise until the wheels z press` against the ceiling or roof ofthe working to steady the cutting-apparatus whilst in action. 'h5 is agroove or recess formed in the plunger h.l A key, g', fixed in the mouthot' the cylinder g, enters this groove in order to prevent the plunger hfrom turning in the cylinder. z'z'are the cutters; they are slidden intothe grooves orA channels f2 of the frame f, and are held securely bycutters z". The arrangement of the cutting-mechanism may,` however, begreatly varied, l v

Having thus described the nature of my invention, and the manner ofperformingthe same, I would have it understood that what I claim, is- YThe combination', in mining-machinery, of the travelling-carriage thatcarries the mining-mechanism, with a yielding-pressure wheel, which,while pressing the said carriage upon its track, and preventing itsrise, permits it to be moved forward without relaxing the pressure, thecombination'being substantially as set forth.

Also the combination and arrangement of the said travelling-carriage,that carries the mininglmeehanism,

with an air-cylinder, to `apply the pressure required to hold the saidcarriage uppn its track, substantially as above set forth.

G.. E, DONISTH'ORPE.

Witnesses W. H. COWLEY,

